Frame transformation theory and the classification of rotational spectra of diatomic molecules according to the five Hund cases provide a guide to the quantum-mechanical formulation of alternative coupling schemes for the treatment of atomic collisions between species carrying spin and electronic angular momenta. An account of the corresponding diabatic representations of the orthogonal transformations among cases and of extensions needed to deal with molecular encounters is presented. Basic to these developments are the tools of angular momentum algebra, and in particular the limiting relationships known as semiclassical limits. Alternative representations for the quantum-mechanical scattering matrix are discussed with reference to the description of steric effects in molecular collisions.

Angular momentum coupling schemes for molecular collisions: the stereodirected representation

AQUILANTI, Vincenzo;CAVALLI, Simonetta;
2000

Abstract

Frame transformation theory and the classification of rotational spectra of diatomic molecules according to the five Hund cases provide a guide to the quantum-mechanical formulation of alternative coupling schemes for the treatment of atomic collisions between species carrying spin and electronic angular momenta. An account of the corresponding diabatic representations of the orthogonal transformations among cases and of extensions needed to deal with molecular encounters is presented. Basic to these developments are the tools of angular momentum algebra, and in particular the limiting relationships known as semiclassical limits. Alternative representations for the quantum-mechanical scattering matrix are discussed with reference to the description of steric effects in molecular collisions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/155782
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